Process temperature sensor with improved thermal insulation

The temperature sensor assembly addresses thermal gradient and environmental exposure issues by using elastomer rings for thermal insulation, enhancing measurement accuracy and reducing manufacturing complexity.

JP2026523183APending Publication Date: 2026-07-13ROSEMOUNT INC
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Patent Information

Application Number
JP2025574326
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-21
Filing Date
2024-06-13
Publication Date
2026-07-13

AI Technical Summary

Technical Problem

Existing surface-mount temperature sensors for low-temperature measurements face challenges in maintaining accurate readings due to thermal gradients and environmental exposure, leading to inaccuracies and increased manufacturing complexity and cost.

Method used

The temperature sensor assembly incorporates elastomer rings to provide thermal insulation between the sensor housing and the cap, allowing for flexible contact with the measured surface while maintaining constant pressure, thereby reducing heat transfer and improving measurement accuracy.

Benefits of technology

The solution enhances thermal insulation and maintains consistent contact with the measured surface, reducing inaccuracies and manufacturing complexity, thus improving measurement accuracy and flexibility.

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Abstract

The temperature sensor assembly (304) includes a temperature sensor body (106) having a defined bore inside. The bore has a first internal feature (324) and a second internal feature (326). A cap (306) is positioned within the bore of the temperature sensor body (106), close to the end of the temperature sensor body. A temperature sensing element (308) is positioned within the cap (306). A first elastomer ring (320) is positioned around the cap (306) and configured to interact with the first internal feature (324) of the temperature sensor body (106). A second elastomer ring (322) is positioned around the cap (306) and spaced apart from the first elastomer ring (320). The second elastomer ring (322) is configured to interact with the second internal feature (326) of the temperature sensor body (106). A wireless field device (101) including a temperature sensor assembly (304) is also provided.
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